Feature

  1. Health & Medicine

    Checkmate for a Child-Killer?

    If a new generation of vaccines pans out, the days of rotavirus, which kills at least 450,000 infants and children every year by causing severe diarrhea, may be numbered.

    By Ben Harder
  2. Animals

    Leashing the Rattlesnake

    Even in the 21st century, there's still room for old-fashioned, do-it-yourself ingenuity in experimental design for studying animal behavior.

    By Susan Milius
  3. Planetary Science

    After the Tragedy

    NASA's plan to return the space shuttles safely to flight after the Columbia accident is coming under intense scrutiny.

    By Ron Cowen

  4. The Body Electric

    An electric field inside an embryo may tell it whether to place an internal organ on its left or right side.